Add basic Solana and EVM Chain capabilities interfaces

Author: ilija42

pkg/types/evm_chain_reader.go

@@ -0,0 +1,14 @@
+package types
+
+import (
+	"context"
+	"fmt"
+)
+
+type UnimplementedEVMChainReader struct{}
+
+var _ EVMChainReader = UnimplementedEVMChainReader{}
+
+func (u UnimplementedEVMChainReader) ReadContract(_ context.Context, _ string, _ []byte) ([]byte, error) {
+	return []byte{}, fmt.Errorf("not implemented")
+}

pkg/types/relayer.go

@@ -78,6 +78,38 @@ type NodeStatus struct {
 	State   string
 }
 
+type SolanaAccount struct {
+	// Number of lamports assigned to this account
+	Lamports uint64
+
+	// Pubkey of the program this account has been assigned to
+	Owner [32]byte
+
+	// Data associated with the account encoded as  "base58", "base64", or "base64+zstd"
+	Data []byte
+
+	// Boolean indicating if the account contains a program (and is strictly read-only)
+	Executable bool
+
+	// The epoch at which this account will next owe rent
+	RentEpoch *big.Int
+}
+
+type SolanaChainReader interface {
+	FindProgramAddress(seed [][]byte, programID [32]byte) ([32]byte, error)
+	GetAccountData(ctx context.Context, programIDs [32]byte) (SolanaAccount, error)
+	GetMultipleAccountData(ctx context.Context, programIDs [][32]byte) ([]SolanaAccount, error)
+}
+
+type EVMChainReader interface {
+	ReadContract(ctx context.Context, method string, encodedParams []byte) ([]byte, error)
+}
+
+type ChainCapabilities interface {
+	SolanaChainReader
+	EVMChainReader
+}
+
 // ChainService is a sub-interface that encapsulates the explicit interactions with a chain, rather than through a provider.
 type ChainService interface {
 	Service
@@ -99,6 +131,8 @@ type ChainService interface {
 type Relayer interface {
 	ChainService
 
+	ChainCapabilities
+
 	// NewContractWriter returns a new ContractWriter.
 	// The format of config depends on the implementation.
 	NewContractWriter(ctx context.Context, config []byte) (ContractWriter, error)

pkg/types/solana_chain_reader.go

@@ -0,0 +1,22 @@
+package types
+
+import (
+	"context"
+	"fmt"
+)
+
+type UnimplementedSolanaChainReader struct{}
+
+var _ SolanaChainReader = UnimplementedSolanaChainReader{}
+
+func (u UnimplementedSolanaChainReader) FindProgramAddress(_ [][]byte, _ [32]byte) ([32]byte, error) {
+	return [32]byte{}, fmt.Errorf("not implemented")
+}
+
+func (u UnimplementedSolanaChainReader) GetAccountData(_ context.Context, _ [32]byte) (SolanaAccount, error) {
+	return SolanaAccount{}, fmt.Errorf("not implemented")
+}
+
+func (u UnimplementedSolanaChainReader) GetMultipleAccountData(_ context.Context, _ [][32]byte) ([]SolanaAccount, error) {
+	return []SolanaAccount{}, fmt.Errorf("not implemented")
+}